With the right combination of fittings and valves (Groco SSC, for example), flushing can be fairly simple. Snap on a freshwater hose, switch the valves, flush. Or snap on a transfer pump hose, switch the valves, flush with Barnacle Buster. Two minutes work to connect/disconnect. Maybe a bit extra to swap the strainer basket, clean the old one afterwards at your leisure (or just soak it clean). -Chris